YOU SAID:
My brother is a brat.
INTO JAPANESE
私の兄はガキです。
BACK INTO ENGLISH
my brother is a kid
INTO JAPANESE
私の兄は子供です
BACK INTO ENGLISH
my brother is a child
INTO JAPANESE
私の兄は子供です
BACK INTO ENGLISH
my brother is a child
You've done this before, haven't you.